向量内积法检相在激光测距系统中的应用

The Phase Difference Detector by Inner Product Applied in Laser Phase Distance Measurement System

用数字方法实现连续波相位式激光测距时,参考信号和回波信号之间相位差的检测是信号处理部分的关键.本文从矢量内积的理论角度,提出了一种新的解决方案.运用矢量内积法直接对正弦数字信号序列进行处理,可以很方便地获得两正弦数字序列的相位差,从而在系统的软件及硬件设计等方面都得以简化。

This paper focuses on a new way of digital phase detector that applied in laser phase distance measurement system. It adopts inner product theory to process digital sine wave. The difference phase of two digital sine wave by a formula is also given in this paper. This new way is simpler than traditional ways, such as FFT.